Application of Multivariate Statistical Analysis to Oil-Source Correlation

Abstract

Abstract: Analysis of 34 crude samples from Heidimiao formation in northern Songliao basin is made with the cluster analysis method.The results show that the crude oil can be divided into two types and three subtypes.From saturated hydrocarbon chromatographicalanalysis, Type-I oil has the top peak intensity in nC14+nC21, Type-IIa takes second, and Type-Ib assumes the lowest; in range ofnC25~nC37, Type II-b predominates instead of Type-IIa, while Type-I assumes the lowest. For Type-I oil, it is dominated by ΣnC21-/ΣnC₂₂⁺ ratio 1and nC₂₁+nC₂₂. In addition, the factor analysis method is adopted to make source correlation of 34 Heidimiao crude samples and 109mudstone samples. It is shown that Type-I crude primarily originated in Q-I member source rock, while Type-II in N-1 source rock, andN-2 source rock has some contributions to it.

Key words: cluster analysis, factor analysis, oil and source rock correlation

CLC Number:

TE112.114.

LI Zhen-guang, LI Jing-kun, SONG Gui-xia. Application of Multivariate Statistical Analysis to Oil-Source Correlation[J]. Xinjiang Petroleum Geology, 2004, 25(3): 262-263.

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Application of Multivariate Statistical Analysis to Oil-Source Correlation

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